.  Dwarves' Earth Treasures Museum: How to ID Agate Roughs   Union Road Agates

-Typical colors: White, black, gray, brown, tan, yellow, other colors are rare.
-Typical sizes: 3 to15 centimeters, rarely larger
-Typical shapes: Rounded to oval chert-like nodules
-Most distinguishing characteristic: White to brownish agate in tan cherty matrix.
-Special Notes: Chromatography is somewhat common while constrasting banding are rare. Quartz geodes are far more common than those with agate. Very small percentage of rough are of any good.